Is Type 2 Diabetes Reversible? What Remission Studies Show

You were told you have type 2 diabetes, and you heard that some people "reverse" it. You may hope to come off medicine one day. That hope is reasonable for some people. This guide explains what experts mean by remission, what studies show, and what it takes.

Remission, not cure

In 2021, an international expert group convened by the American Diabetes Association (ADA) chose the word remission [1]. They did not use "reversal" or "cure", because blood sugar can rise again later.

The group set a simple definition [1]:

• A1C below 6.5% (48 mmol/mol)
• Measured at least 3 months after stopping all glucose-lowering medicine

A1C is a blood test that shows your average blood sugar over about 3 months.

If your A1C is below 6.5% while you still take medicine, that is good control, not remission. Some medicines, like metformin, also have other uses. The definition applies when you are off all medicines used to lower blood sugar.

Why weight loss can lead to remission

In many people with type 2 diabetes, extra fat builds up in the liver and pancreas. This can make the liver release too much sugar and can stress the cells that make insulin. Large weight loss can reduce this fat. In some people, insulin release then improves enough to bring blood sugar back to normal.

What your doctor looks at

The DiRECT trial

DiRECT was a trial in UK family practices. It enrolled adults who had type 2 diabetes for up to 6 years, did not use insulin, and had a BMI of 27 to 45 [2].

The weight management program included:

• Stopping diabetes and blood pressure medicines at the start, under medical supervision
• A low-calorie liquid diet of about 825 to 853 calories a day for about 3 to 5 months
• A stepped return to regular food
• Long-term support to keep weight off

Results at 1 year [2]:

• 46% of people in the program reached remission, compared with 4% with usual care.
• Average weight loss was 10 kg, compared with 1 kg.
• Remission rose with weight loss: none of those who gained weight, 7% of those who lost up to 5 kg, 34% of those who lost 5 to 10 kg, 57% of those who lost 10 to 15 kg, and 86% of those who lost 15 kg or more.

Look AHEAD

Look AHEAD was a large US trial of an intensive lifestyle program in adults with type 2 diabetes and overweight [3]. Any remission, full or partial, occurred in 11.5% of the lifestyle group during the first year and 7.3% at year 4, compared with 2.0% in the comparison group [3]. Remission was less common than in DiRECT. Look AHEAD did not use a liquid diet, and many people had had diabetes for longer.

Bariatric surgery

The STAMPEDE trial compared surgery with intensive medical care in adults with type 2 diabetes and a BMI of 27 to 43 [4]. At 5 years, an A1C of 6.0% or lower, with or without medicine, was reached by:

• 29% after gastric bypass
• 23% after sleeve gastrectomy
• 5% with medical therapy alone [4]

What predicts remission

Remission is more likely when [1] [2]:

• You have had diabetes for a shorter time.
• You do not need insulin.
• You lose a large amount of weight and keep it off.

Canadian and US practice

The ADA-led consensus is used widely in both countries [1]. Diabetes Canada guidelines also support weight management as a core part of type 2 diabetes care [5]. Access to structured low-calorie programs and surgery differs by province and state.

Staying safe while you try

• Do not stop or change diabetes medicines on your own. Some, like insulin and sulfonylureas, can cause low blood sugar when you eat much less. Your clinician can adjust them safely.
• Very low-calorie diets need medical supervision.
• Blood pressure medicines may also need changes as you lose weight.

Life after remission

Remission is a major win, but follow-up still matters [1]:

• Check A1C at least once a year, because blood sugar can rise again.
• Keep up eye exams, kidney tests, and foot checks, because past high blood sugar can still affect these organs.
• Keep treating blood pressure and cholesterol as needed.
• Watch for weight regain, which is the main reason remission ends.

Remission and GLP-1 medicines

GLP-1 medicines such as semaglutide can lead to large weight loss. They also lower blood sugar directly. Under the 2021 definition, remission is judged after glucose-lowering medicines have been stopped for at least 3 months [1]. So while you take one of these medicines, a normal A1C counts as good control, not remission. Do not stop a medicine to test this without a plan from your clinician.

Questions to ask your clinician

• Is remission a realistic goal for me?
• How much weight loss might I need?
• Is there a structured weight management program I can join?
• How will my medicines be adjusted as I lose weight?
• Would a GLP-1 medicine or surgery be an option for me?
• How will we confirm remission?
• What checkups will I still need if I reach remission?

When to get care quickly

Get urgent care if you have signs of low blood sugar that do not improve with treatment, such as confusion or fainting. Also get urgent care for very high blood sugar with vomiting, deep fast breathing, or severe drowsiness.

Bottom line

Type 2 diabetes can go into remission for some people, mostly through large and lasting weight loss. In DiRECT, almost half reached remission at 1 year, and most of those who lost 15 kg or more did. Remission is not a cure, so regular checks are still needed.

Primary AI can show you the guideline and study sources behind this topic in plain language, so you can bring better questions to your appointment.